HDMI (High Definition Multimedia Interface) signal output circuit supporting input of various signals

Abstract

The utility model provides an HDMI (High Definition Multimedia Interface) signal output circuit supporting input of various signals, comprising an input end of a Type-C signal conversion circuit capable of receiving a Type-C interface signal source of intelligent electronic equipment, and an input end of a DP signal conversion circuit capable of receiving a DP interface signal source of the intelligent electronic equipment, the output end of the Type-C signal conversion circuit and the output end of the DP signal conversion circuit are connected with the input end of the HDMI signal path switching circuit, the input end of the HDMI signal path switching circuit can also receive an HDMI interface signal source of intelligent electronic equipment, and the output end of the HDMI signal path switching circuit can be connected with an HDMI interface of a television. The utility model has the beneficial effects that the Type-C interface of the mobile phone or the DP interface of the computer can be directly connected with the HDMI interface of the television, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, in particular to an HDMI signal output circuit supporting multiple signal inputs. Background Art

[0002] HDMI refers to High Definition Multimedia Interface (HDMI), which is a digital video / audio interface technology and a dedicated digital interface suitable for image transmission. It can transmit audio and image signals at the same time, with a maximum data transmission speed of 2.25GB / s. At the same time, there is no need for digital / analog or analog / digital conversion before signal transmission. HDMI can be used with broadband digital content protection (HDCP) to prevent unauthorized copying of copyrighted audio and video content. The extra space of HDMI can be applied to audio and video formats upgraded in the future. Because a 1080p video and an 8-channel audio signal require less than 0.5GB / s, HDMI still has a large margin, which allows it to use one cable to connect DVD players, receivers and PRRs respectively.

[0003] Type-C is a USB interface that can be inserted regardless of the front or back. It is approximately 8.3mm×2.5mm in size and supports USB standard charging, data transmission, display output and other functions like other interfaces. Type-C was developed by the USB Implementers Forum and became popular after gaining support from Apple, Google, Intel, Microsoft and other manufacturers in 2014. DP, or DisplayPort, is a high-definition digital display interface standard that can connect computers and monitors.

[0004] In daily life, commonly used interfaces of TVs include HDMI, S-terminal, VGA and AV. The signal source of TVs mainly comes from the HDMI interface. However, sometimes people want to use TVs to play signal sources of other smart electronic devices. At this time, since the signal source interface of other smart electronic devices is not compatible with the TV interface, it is difficult to connect them directly to the TV. For example, mobile phones and computers use Type-C or DP interfaces. If you want to play videos or music on your mobile phone or computer on the TV, you need to save the signal file separately and use the existing interface of the TV to save and output it to the TV. The existing interface of the TV cannot be directly connected to the Type-C interface of the mobile phone or the DP interface of the computer. This is a very bad user experience for users. Utility Model Content

[0005] In order to solve the problems in the prior art, the utility model provides an HDMI signal output circuit that supports multiple signal inputs, which is arranged in a signal conversion transmission line. By arranging a Type-C signal conversion circuit, a DP signal conversion circuit and an HDMI signal path switching circuit that cooperate with each other in the signal conversion transmission line, the Type-C interface of a mobile phone or the DP interface of a computer can be directly connected to the HDMI interface of a TV through the signal conversion transmission line, and the video or audio signal source to be played in the mobile phone or computer can be directly played on the TV, which greatly improves the user experience and solves the problem in the prior art that the existing interface of the TV cannot be directly connected to the Type-C interface of the mobile phone or the DP interface of the computer, resulting in an insufficient user experience.

[0006] The utility model provides an HDMI signal output circuit supporting multiple signal inputs, which is arranged in a signal conversion transmission line and comprises a Type-C signal conversion circuit, a DP signal conversion circuit and an HDMI signal path switching circuit. The input end of the Type-C signal conversion circuit can receive a Type-C interface signal source of an intelligent electronic device, the input end of the DP signal conversion circuit can receive a DP interface signal source of the intelligent electronic device, the output end of the Type-C signal conversion circuit and the output end of the DP signal conversion circuit are connected to the input end of the HDMI signal path switching circuit, the input end of the HDMI signal path switching circuit can also receive an HDMI interface signal source of an intelligent electronic device, the output end of the HDMI signal path switching circuit can be connected to an HDMI interface of a television, the Type-C signal conversion circuit can receive a Type-C interface signal source of an intelligent electronic device and convert it into an HDMI signal, the DP signal conversion circuit can receive a DP interface signal source of an intelligent electronic device and convert it into an HDMI signal, and the HDMI signal path switching circuit can switch and output the signal to the television for direct playback.

[0007] The utility model is further improved, the Type-C signal conversion circuit is provided with a Type-C signal conversion chip U4, the Type-C signal conversion chip U4 is provided with 49 pins, the 43rd, 44th, 46th and 47th pins of the Type-C signal conversion chip U4 can receive the Type-C interface signal source of the intelligent electronic device, and the 13th, 14th, 16th, 17th, 18th, 19th, 21st and 22nd pins of the Type-C signal conversion chip U4 are connected to the input end of the HDMI signal path switching circuit.

[0008] The utility model is further improved. A DP signal conversion chip U8 is provided in the DP signal conversion circuit. The DP signal conversion chip U8 has 49 pins. Pins 38, 39, 41, 42, 43, 44, 46 and 47 of the DP signal conversion chip U8 can receive the DP interface signal source of the intelligent electronic device. Pins 13, 14, 16, 17, 18, 19, 21 and 22 of the DP signal conversion chip U8 are connected to the input end of the HDMI signal path switching circuit.

[0009] The utility model is further improved, the HDMI signal path switching circuit is provided with an HDMI signal path switching chip U15, the HDMI signal path switching chip U15 is provided with 124 pins, the 100th, 101st, 103rd, 104th, 106th, 107th, 109th, 110th pins of the HDMI signal path switching chip U15 can receive the HDMI interface signal source of the intelligent electronic device, the 111th, 112th, 114th, 115th, 117th, 118th, 120th, 121st pins of the HDMI signal path switching chip U15 The pins are respectively connected to the 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the Type-C signal conversion chip U4, the 7th, 8th, 10th, 11th, 13th, 14th, 16th, and 17th pins of the HDMI signal path switching chip U15 are respectively connected to the 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the DP signal conversion chip U8, and the 39th, 40th, 42nd, 43rd, 45th, 46th, 48th, and 49th pins of the HDMI signal path switching chip U15 can be connected to the HDMI interface of the TV.

[0010] The utility model is further improved, and the model of the Type-C signal conversion chip U4 is GSV2201S.

[0011] The utility model is further improved, and the model of the DP signal conversion chip U8 is GSV2201D.

[0012] The utility model is further improved, and the model of the HDMI signal path switching chip U15 is GSV2705.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: an HDMI signal output circuit supporting multiple signal inputs is provided, which is arranged in a signal conversion transmission line; by arranging a Type-C signal conversion circuit, a DP signal conversion circuit and an HDMI signal path switching circuit that cooperate with each other in the signal conversion transmission line, the Type-C signal conversion circuit can receive the Type-C interface signal source of the intelligent electronic device and convert it into an HDMI signal, the DP signal conversion circuit can receive the DP interface signal source of the intelligent electronic device and convert it into an HDMI signal, and the HDMI signal path switching circuit switches the output to the TV for direct playback, so that the Type-C interface of the mobile phone or the DP interface of the computer can be directly connected to the HDMI interface of the TV through the signal conversion transmission line, and the video or audio signal source to be played in the mobile phone or computer can be directly played on the TV, which greatly improves the user experience and solves the problem in the prior art that the existing interface of the TV cannot be directly connected to the Type-C interface of the mobile phone or the DP interface of the computer, resulting in an insufficient user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a principle block diagram of an HDMI signal output circuit supporting multiple signal inputs of the utility model;

[0016] Figure 2 This is a circuit diagram of the Type-C signal conversion circuit of the utility model;

[0017] Figure 3 It is a circuit diagram of the DP signal conversion circuit of the utility model;

[0018] Figure 4 It is a circuit diagram of the HDMI signal path switching circuit of the present utility model. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present utility model; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "including" and "having" and any variations thereof in the specification and claims of the present utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0022] like Figure 1-4 As shown, the utility model provides an HDMI signal output circuit supporting multiple signal inputs, which is arranged in a signal conversion transmission line, and includes a Type-C signal conversion circuit, a DP signal conversion circuit and an HDMI signal path switching circuit. The input end of the Type-C signal conversion circuit can receive a Type-C interface signal source of an intelligent electronic device, the input end of the DP signal conversion circuit can receive a DP interface signal source of an intelligent electronic device, the output end of the Type-C signal conversion circuit and the output end of the DP signal conversion circuit are connected to the input end of the HDMI signal path switching circuit, the input end of the HDMI signal path switching circuit can also receive an HDMI interface signal source of an intelligent electronic device, and the output end of the HDMI signal path switching circuit can be connected to the HDMI interface of a TV. In this embodiment, the Type-C signal conversion circuit can receive the Type-C interface signal source of the smart electronic device and convert it into an HDMI signal, and the DP signal conversion circuit can receive the DP interface signal source of the smart electronic device and convert it into an HDMI signal, which is then switched and output to the TV for direct playback via the HDMI signal path switching circuit. The Type-C interface of the mobile phone or the DP interface of the computer can be directly connected to the HDMI interface of the TV through a signal conversion transmission line, and the video or audio signal source to be played in the mobile phone or computer can be directly played on the TV, greatly improving the user experience.

[0023] like Figure 2 As shown, a Type-C signal conversion circuit is provided with a Type-C signal conversion chip U4, the model of the Type-C signal conversion chip U4 is GSV2201S, and the Type-C signal conversion chip U4 is provided with 49 pins. The 43rd, 44th, 46th, and 47th pins of the Type-C signal conversion chip U4 can receive the Type-C interface signal source of the intelligent electronic device, and the 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the Type-C signal conversion chip U4 are connected to the input end of the HDMI signal path switching circuit. In this embodiment, the Type-C signal conversion circuit is used to receive the Type-C interface signal source of the intelligent electronic device and convert it into an HDMI signal, and output it to the HDMI signal path switching circuit.

[0024] like Figure 3 As shown, the DP signal conversion circuit is provided with a DP signal conversion chip U8, the model of the DP signal conversion chip U8 is GSV2201D, and the DP signal conversion chip U8 is provided with 49 pins. The 38th, 39th, 41st, 42nd, 43rd, 44th, 46th, and 47th pins of the DP signal conversion chip U8 can receive the DP interface signal source of the intelligent electronic device, and the 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the DP signal conversion chip U8 are connected to the input end of the HDMI signal path switching circuit. In this embodiment, the DP signal conversion circuit is used to receive the DP interface signal source of the intelligent electronic device and convert it into an HDMI signal, and output it to the HDMI signal path switching circuit.

[0025] like Figure 4As shown, the HDMI signal path switching circuit is provided with an HDMI signal path switching chip U15, the model of the HDMI signal path switching chip U15 is GSV2705, the HDMI signal path switching chip U15 is provided with 124 pins, the 100th, 101st, 103rd, 104th, 106th, 107th, 109th, 110th pins of the HDMI signal path switching chip U15 can receive the HDMI interface signal source of the intelligent electronic device, the 111th, 112th, 114th, 115th, 117th, 118th pins of the HDMI signal path switching chip U15 can receive the HDMI interface signal source of the intelligent electronic device, and the 112th, 113th, 114th, 115th, 117th, 118th pins of the HDMI signal path switching chip U15 can receive the HDMI interface signal source of the intelligent electronic device, and the ... , 120, 121 pins are respectively connected to the 13th, 14th, 16th, 17th, 18th, 19th, 21st, 22nd pins of the Type-C signal conversion chip U4, the 7th, 8th, 10th, 11th, 13th, 14th, 16th, 17th pins of the HDMI signal path switching chip U15 are respectively connected to the 13th, 14th, 16th, 17th, 18th, 19th, 21st, 22nd pins of the DP signal conversion chip U8, and the 39th, 40th, 42nd, 43rd, 45th, 46th, 48th, 49th pins of the HDMI signal path switching chip U15 can be connected to the HDMI interface of the TV. In this embodiment, the HDMI signal path switching circuit is used to receive the HDMI signal converted by the Type-C signal conversion circuit, the HDMI signal converted by the DP signal conversion circuit, and the HDMI interface signal source of the intelligent electronic device, and select one of the HDMI signals to output to the HDMI interface of the TV for playback on the TV.

[0026] As can be seen from the above, the utility model provides an HDMI signal output circuit that supports multiple signal inputs, which is arranged in a signal conversion transmission line. By arranging a Type-C signal conversion circuit, a DP signal conversion circuit and an HDMI signal path switching circuit that cooperate with each other in the signal conversion transmission line, the Type-C signal conversion circuit can receive the Type-C interface signal source of the intelligent electronic device and convert it into an HDMI signal, and the DP signal conversion circuit can receive the DP interface signal source of the intelligent electronic device and convert it into an HDMI signal. The HDMI signal path switching circuit switches the output to the TV for direct playback, and can realize that the Type-C interface of the mobile phone or the DP interface of the computer is directly connected to the HDMI interface of the TV through the signal conversion transmission line, and the video or audio signal source to be played in the mobile phone or computer is directly played on the TV, which greatly improves the user experience and solves the problem in the prior art that the existing interface of the TV cannot be directly connected to the Type-C interface of the mobile phone or the DP interface of the computer, resulting in an insufficient user experience.

[0027] The specific implementation methods described above are preferred implementation methods of the present utility model, and are not intended to limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to the specific implementation methods. All equivalent changes made in accordance with the present utility model are within the protection scope of the present utility model.

Claims

1. An HDMI signal output circuit supporting multiple signal inputs, arranged in a signal conversion transmission line, characterized in that: The invention comprises a Type-C signal conversion circuit, a DP signal conversion circuit and an HDMI signal path switching circuit, wherein the input end of the Type-C signal conversion circuit can receive a Type-C interface signal source of an intelligent electronic device, the input end of the DP signal conversion circuit can receive a DP interface signal source of an intelligent electronic device, the output end of the Type-C signal conversion circuit and the output end of the DP signal conversion circuit are connected to the input end of the HDMI signal path switching circuit, the input end of the HDMI signal path switching circuit can also receive an HDMI interface signal source of an intelligent electronic device, the output end of the HDMI signal path switching circuit can be connected to an HDMI interface of a television, the Type-C signal conversion circuit can receive a Type-C interface signal source of an intelligent electronic device and convert it into an HDMI signal, the DP signal conversion circuit can receive a DP interface signal source of an intelligent electronic device and convert it into an HDMI signal, and the HDMI signal path switching circuit can switch and output the signal to the television for direct playback.

2. The HDMI signal output circuit supporting multiple signal inputs according to claim 1, characterized in that: A Type-C signal conversion chip U4 is provided in the Type-C signal conversion circuit, and the Type-C signal conversion chip U4 is provided with 49 pins. Pins 43, 44, 46, and 47 of the Type-C signal conversion chip U4 can receive the Type-C interface signal source of the intelligent electronic device, and pins 13, 14, 16, 17, 18, 19, 21, and 22 of the Type-C signal conversion chip U4 are connected to the input end of the HDMI signal path switching circuit.

3. The HDMI signal output circuit supporting multiple signal inputs according to claim 2, characterized in that: A DP signal conversion chip U8 is provided in the DP signal conversion circuit, and the DP signal conversion chip U8 has 49 pins. Pins 38, 39, 41, 42, 43, 44, 46, and 47 of the DP signal conversion chip U8 can receive the DP interface signal source of the intelligent electronic device, and pins 13, 14, 16, 17, 18, 19, 21, and 22 of the DP signal conversion chip U8 are connected to the input end of the HDMI signal path switching circuit.

4. The HDMI signal output circuit supporting multiple signal inputs according to claim 3, characterized in that: The HDMI signal path switching circuit is provided with an HDMI signal path switching chip U15, and the HDMI signal path switching chip U15 is provided with 124 pins. The 100th, 101st, 103rd, 104th, 106th, 107th, 109th, 110th pins of the HDMI signal path switching chip U15 can receive the HDMI interface signal source of the intelligent electronic device, and the 111th, 112th, 114th, 115th, 117th, 118th, 120th, 121st pins of the HDMI signal path switching chip U15 are respectively connected to the The 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the Type-C signal conversion chip U4 are connected, and the 7th, 8th, 10th, 11th, 13th, 14th, 16th, and 17th pins of the HDMI signal path switching chip U15 are respectively connected to the 13th, 14th, 16th, 17th, 18th, 19th, 21st, and 22nd pins of the DP signal conversion chip U8, and the 39th, 40th, 42nd, 43rd, 45th, 46th, 48th, and 49th pins of the HDMI signal path switching chip U15 can be connected to the HDMI interface of the TV.

5. The HDMI signal output circuit supporting multiple signal inputs according to claim 4, characterized in that: The model of the Type-C signal conversion chip U4 is GSV2201S.

6. The HDMI signal output circuit supporting multiple signal inputs according to claim 5, characterized in that: The model of the DP signal conversion chip U8 is GSV2201D.

7. The HDMI signal output circuit supporting multiple signal inputs according to claim 6, characterized in that: The model of the HDMI signal path switching chip U15 is GSV2705.

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